Leather-polishing machine.



PATENTED FEB. 2-1, 1905.

H. HOGHGESAND. LEATHER POLISHING MACHINE.

y APPLIOATIOH FILED JAN. 14, 1904.

2 SHEETS-SHEET 1v.

No. 783,040. PATENTED FEB. 2l, 1905. H. HOGHGESAND.

LEATHER POLISHING MACHINE. APPLIoATIoN FILED 1111.14, 1904.

2 SHEETS-SHEET 2.

UNITED STATES Patented February 21, 1905.

PATENT OEETCE.

HERMANN HOOHGESAND, OF VVORMS. GERMANY, ASSIGNOR TO THE FIRM OF CORNELIUS HEYL, OF WORMS, GERMANY.

LEATHER-POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 783,040, dated February 21, 1905.

Application filed January 14, 1904. Serial No. 188,954.

To a/ZZ whom, it may concern:

Be it known that I, HERMANN HooIiGEsAND, manager, residing at No. 7 Siegfriedstrasse, I/Vorms-on-the-Rhine, Germany, have invent- 5 ed new and useful Improvements in Leather- Polishing Machines, of which the following is a specification.

In making lacquered leather, or what is known as patent-leather, before the lacquer o is put on the porous and rough surface of the tanned leather is made impermeable and covered by repeated applications of varnish, called grounds. Each one of these grounds after drying is carefully polished off with a pumice-stone and pumice-powder sprinkled on in order that the surface may become as smooth and mirror-like as possible. For this f work, which necessitates a considerable eX- penditure of force, different machines have o already been provided. Of allthese machines,

however, none has been thoroughly successful, for greater or less defects attach to the goods produced by them, so that even to-day in most patent-leather manufactories the skins 5 are polished by hand. In thus polishing', the hand-polisher takes the pumice-stone with his right hand and thrusts it out to arms length over the skin lying before him. /Vith this movement of the arm he executes also a slight o second movement with the wrist, whereby the delicacy and uniformity of the polish is really first effected. Thus the stone during the polishing stroke has a double movement-first, in horizontal direction and, second, a slight 5 swinging or rocking movement in perpendicular direction.

Now the object `of the present invention is to produce a machine which performs faultless work exactly imitating handwork. This O is attained by effecting the swinging or rocking movement referred to of the polishingstone by means of a suitable construction of the tool-holder.

In order to attain the desired object, a sha- 5 greening-machine such as is Well known in various forms in leather manufacture is so changed that it may be employed for the purpose of polishing leather by setting the polishing-stone in such manner that it imitates the movement of the wrist of the hand-polisher.

According to the present invention the polishing-stone, which is set into the arm of the shagreening-machine in place of a glass roll, is placed in its holder between thick rubber plates, preferably of sponge-rubber, in such manner that, as described above, it can during the movement of the polishing-arm execute a second swinging movement. An elastic bed, of rubber, several layers of liannel, linoleum, thin tin, &c., serves in known manner as a surface for the skin to be worked upon. The leather produced on such a machine possesses a higher value and the polishing of the ground can be performed without the force hitherto expended and at less cost.

The accompanying drawings serve to illustrate the invention.

Figure 1 represents a side elevation of a polishing-machine embodying the improvement; Fig. 2, a front view of the polishingtool proper; Fig. 3,- a vertical section of the polishing-tool and its holder, taken at right angles to Fig. 2.

The general arrangement and the driving' of the machine are the same as in the known shagreening-machines.

As may be understood by reference to Fig.

l, a reciprocal movement is imparted to the polishing-tool carrier a by means of an arm 1 from a crank-Wrist on a Adisk 2.

3 4 are radius-bars forming the guide for the polishing-tool carrier a, to which the toolstock 9 is fastened by an arbor 5, socket 6, and adjusting-screw 7.

7% is the support, which is pressed against the polishing-tool by pressure of the foot upon a treadle 8.

The tool-stock 9 is secured to the polishingarm 1 in any suitable manner. The too-holder 12 is secured in the stock 9 by screw-bolts 11 and a cheek-plate 10.

The tool-holder 12 has the polishing-stone 13 set into it by means of molten sulfur 14 or an equivalent substance. The holder l2 itself is held in the stockn between thick spongerubber side plates 15"v by means of the cheekplate 10 and screws 1l.

The support 'For the skin to be polished is the table 7 "i, of cast-iron, on which there are represented, going from below upward, a layer oi wood 16"`", of rubber 17', flannel 18%, and leather 19""1 On top there is laid the leather to`be worked. The individual layers 16'4 17% 18": 19' can be replaced by others according to need. For example, linoleum or tin-plate may also be employed.

The setting' in and exchanging of the polishing-stones can be easily effected.

The operation of the machine is as follows: The table 7% is adjusted in a position parallel to the path of the polishing-stone 13 by means ofthe spindle and hand-wheel 15. In addition the table may be adjusted by the'handwheel and spindle 16, the latter being connected to the angle-levers 17 and 18, which are connected by a bar 20, as shown. IVhen the treadle 8 is pressed downward, the wedge 19, which is connected to the treadle by a link 2Q and slides against a stationary bearing on the front of the frame, is likewise moved downward and comes into operation on a sleeve 23 upon the spindle 16, thereby moving the latter forward or toward the left of Fig. l, thus swinging the levers 17 18 and moving the table 7 '2i into the path oi" the polishing-stone 13. The sleeve 23 may be adjusted on the spindle 16 against the tension ofthe coiled spring 2i, 3l

which spring serves to press the table against the stone 13 in a somewhat resilient manner. I hen the treadle 8 is released, the counterweight Q1 will return the parts to their normal positions and move the table away from 3` the polishing-stone.

That I claim as my invention is-- In a leather-polishing machine, the combination with a reciprocating polishing-arm and a polishing-tool holder attached thereto, of 4 plates of elastic material applied on opposite sides of said holder to permit a rocking movement to be given to the tool by its contact with the leather to be polished, during the reciprocating movement of the polishing-arm. 4i

In testimony whereot` I have signed my name to this specilication in the presence of two subscribing witnesses. n

HERMANN HOCHGESAND.

IVitnesses:

LUDWIG HAss, GUs'rAv Soi-IEUERMANN. 

